Mixing machine



March 28, 1944. E. J. KARP 2,345.266

MIXING MACHINE Filed April 25, 1941 6 Sheets-Sheet l March 28, 1944. E.J. KARP MIXING MACHINE 6 Sheets-Sheet 2 Filed April 25, 1941 k 3 Z 6 WMId m m r M L444, m rflioua March 28, 1944. E. J. KARP MIXING MACHINE 6Sheets-Sheet 5 Filed April 25, 1941 f/u/eni pw: Fciwapwd If 1 101-60March 28, 1944.

E. J. KARP MIXING MACHINE 6 Sheets-Sheet ,4

Filed April 25, 1941 Fig. 5.

5% Z m my a 1 M March 28,1944; E. J. KARP MIXING MACHINE Filed April 25)1941 6 Sheets-Sneet 5 f/u @290 7" Q Fain/arm Ha/170.

March 28, 1944. g, 3, P 2,345,266

MIXING MACHINE Filed April 25, 1941 6 Sheets-Sheet 6 jig/0.

ZZZ? 23? I 24? Patented Mar. 28, 1944 MIXING MACHINE Edward J. Karp,Cicero, 111., assignor to G. S. Blakeslee -& 00., Cicero, 111., acorporation of Illinois Application April 25, 1941, Serial No. 399,229

12 Claims. (Cl. Ii-230.17)

I driving connection variable in speed by. adjustment of the motorrelative to the drive shaft, means being provided for supporting andadjusting the motor while permitting removal and replacement thereofwith expedition and facility. Further objects and advantages will appearfrom the detail description.

In the drawings:

Figure 1 is a side view of a mixing machine embodying my invention, withparts broken away and other parts shown in section;

Figure 2 is a front view of the machine of Figi ure 1 with the lowerportion of the head housin broken away and the lower gear housing of thetransmission unit omitted for cleamess of illustration, certain partsbeing shown in section and certain other parts being shown in elevation;the mixing bowl being omitted;

Figure 3 is a detail fragmentary sectional view taken substantially online 3-3 of Figure 2, on an enlarged scale;

Figure 4 is a plan view of the machine of Figure 1, with the cover ofthe head housing removed; I

Figure 5 is a sectional view, on an enlarged scale, taken substantiallyon line 5-5 of Figure 4;

Figure 6 is a sectional view, on an enlarged scale and partly brokenaway, taken substantially on line 6-6 of Figure 4;

Figure 7 is a detail sectional view, on an enlarged scale, takensubstantially on line 'l-l of Figure 6;

Figure 8 is a fragmentary sectional View, on an enlarged scale, takensubstantially on line 88 of Figure 2, certain parts being shown inelevation;

Figure 9 is a side view of a modified form of mixing machine embodyingmy invention;

Figure 10 is a plan view of the machine of Figure 9' with the top coverremoved and the pulleys and belt omitted for cleamess ofillustrationzand Figure 11 is a sectional view taken substantially online of Figure 9.

The machine illustrated in Figures 1 to 8, inclusive, comprises a base20, which may be in the form of a casting. A column 2|, of substantiallyrectangular cross section, is mounted upon base 20 and secured theretoin any suitable manner, conveniently by bolting. The upper portion ofcolumn 2| is formed to provide a head in the form of a housing 22, theforward portion of which provides an overhang 23 projecting forward fromthe front vertical wall of column 2|. The column 2| and head 22,including the overhang 23, is formed of sheet or plate steel, theelements thereof being secured together in a suitable manner, preferablyby welding. An upwardly projecting flange 24 is welded to the upper endof head 22, about the periphery thereof, and receives the lower edgeportion of a box-like cover 25, also preferably formed of sheet or platemetal, which seats upon the upper edge of head 22. Cover 25 is removablysecured in position by two screws 26 passing therethrough and threadinginto the upper arms of two inverted L-shaped brackets 21 welded at theirlower portions to the inner surface of head 22 at opposite sidesthereof. It will be understood that, within the broader aspects of myinvention. the column 2|, including head 22 and overhang 23 thereof, andthe cover 25 may be otherwise constructed and related, though the sheetor plate metal construction is preferred as conducive to light weightwhile assuming adequate strength. j

A reinforcing plate 28 extends on edge across the rearward end of thelower portion of overhang 23, this plate being disposed substantially inthe plane of the front wall of column 2| and being welded to the latterand to head 22 thereof. A horizontal diaphragm plate 29 extends betweenthe side walls of overhang 23 and between plate 28 and the front wall ofthe overhang, this plate being welded toplate 28 and to the side andfront walls of overhang 23. The plates 28 and 29 eifectively reinforcethe overhang and the column 2| at the juncture thereof with overhang 23.

' Column 2| is further reinforced by a cross plate 3| extendingtransversely of head 22 adjacent rearwall 32, this plate 3| beingdisposed on edge and welded tothe side walls of the head portion of thecolumn.

Overhang 23 of head 22 provides a housing for a transmission unit 33.This unit comprises an upper gear housing 34, which fits through acorresponding opening in diaphragm plate 29 and ex- .tends upward abovethat plate, a flange 35 at the shaft 31.

lower end of housing 34 bolted to plate 23 at the under face thereof, alower gear housing 36 supported from gear housing 34, a drive shaft 31extending upward from gear housing 34, a driven shaft 38 extendingdownward from gear housing 36, and means for driving shaft 38 and lowergear housing 34 from shaft 31, so as to rotateshaft 38 about its ownaxis while revolving the latter shaft about an axis eccentric thereto;The transmission unit 33 preferably is similar to the unit disclosed inmy copending application for Transmission unit, Serial No. 452,063,filed July 23, 1942. It may, however, be of any suitable known type,within the broader aspects of my invention. Suffice it to state that asuitable transmission unit is provided whereby rotation of shaft 31causes rotation of shaft 38 as well as revolution of the latter shaftabout an axis eccentric thereto, as stated.

A V pulley 46 is secured on the upper end of drive shaft 31 and receivesa V belt. 4|, which passes about a V pulley 42 mounted on the upper endof shaft 43 of a vertically disposed electric motor 44, supported foradjustment toward and away from shaft 31. Pulley 42 is suitablyconnected to motor shaft 43 to be driven thereby, and

55 seat. Each rod 55 is provided with an upcomprises a lower member 45and an upper mem-.'

' ber 46. When motor 44 is in its position shown in Figure 1, belt 4| isadjacent the periphery of pulley 42 and shaft 31 is then driven at highspeed.

Adjustment of motor 44 away from shaft 31 causes movement of pulley 42rearward relative to belt 4|, with downward movement of member 45 andupward movement of member 46, thus reducing the effective pitch diameterof pulley 42 and correspondingly reducing the speed of drive of It isthus possible, by appropriate adjustment of motor 44, to vary the speedof drive of shaft 31 infinitely, within limits.

The pulley 42 is of known type, that shown being known as the LewellenVari-drive pulley, nd need not be illustrated or described here ingreater detail. Suflice it to state that means is provided whereby thespeed of drive of shaft 31 may be varied by adjustment of motor relativeto this shaft, and my invention comprehends any suitable drive foraccomplishing that result.

Motor 44 is bolted to front wall 49 of a suitably reinforced carriage.53 ,of substantially inverted U shape in side view. It willbeunderstood, of course, that motor 44 may be bolted or otherwise suitablysecured to back wall 5|, or any other, suitable portion of carriage 56.Back wall 5| of .54 which receives the edge portions of wall 5| adjacentslot 52. Carriage 50 is thus provided, at each side thereof, with twoaligned bushings 53 fitting into the slots 52 and restrained againstendwise movement relative to carriage 50. Two supporting and guide rods55 are inserted through The rearward plate 3| is provided with twoverticalslots 56. .,opening through its upper edge, in which slots therearward end portions of the rods 70 the aligned pairs pf bushings 53,and have their forward end'portions inserted through plate 23.

wardly opening transverse groove 51 which receives the lower portion ofa locking bar 58 bolted to plate 3|. Rods 55 are thus restrained againstlengthwise movement, and motor carriage 50 is suspended from these rodsand is slidably mounted thereon, by means of the bushings 53, foradjustment therealong toward and away from drive shaft 31.

Locking bar 58 is provided at one end thereof with an upwardlyprojecting extension 6|), dis posed above one of the rods 55. Extension60 receives a flanged bearing bushing 6| (Figure l) in which isrotatably mounted a reduced stud 62 at the rearward end of an adjustingshaft 63. Shaft 63 is provided with a. threaded portion 64 which screwsthrough a nut mounted in a slot 66 opening through one side of back wall5| of the motor carriage. Nut 65 is provided at its upper and its lowerportion with an outwardly opening transverse groove having astraightinner wall or bottom, these grooves receiving the edge portions of wall5| at the top and thebottom of slot 66, with the upper and lower edgesof the slot in snug contact with the inner or bottom' walls of thegrooves in nut 65 effective for preventing rotation of this nut. Thisconnection between the nut 65 and wall 6 I also serves to restrain thenut against endwise movement relative to wall 5| and to .connect itthereto for adjusting carriage 50. Shaft 63 passes through front wall 48of carriage 56 and through a bearing bushing 68 mounted through frontwall 36 of overhang 23 of head 22. Bushing 68 is provided with anupwardly opening transverse groove 63 (Figure 8) which receives thelower edge portion of a locking plate 1|] bolted to the outer face ofwall 30. A hand wheel 1| is rearward movement. A thrust washer 14, of

known type, is disposed about shaft 63, free therefrom, and in contactwith the inner end of bushing 68. A worm gear 15 is disposed on shaft 63with its forward end in contact with washer 14,

and is secured to shaft 63 by means of a suitable pin 16. The thrustcollar or washer 14 and the worm 15 cooperate withbushing 66 forrestraining the shaft 63 against endwise movement in a forwarddirection. :By rotating shaft 53 in proper direction, motor carriage 50may be adjusted along rods '55 toward oraway from drive shaft 31 fordriving the latter at any desired speed, within limits.

locking plate 10 is spaced from the front and the bottom walls of groove69.01 bushing 68, and the opening in wall 30 through which bushing 63passes is of somewhat greater diameter than the bushing, as shown inFigure 8. Bushing 68thus rests upon the edge of wall 36, at the lowerportion of the opening, and is capable of rocking movement suflicient toaccommodate slight inaccuracies in alignment of the bearings for shaft63, due to inaccuracies in assembly or manufacture, often difficult toavoid in sheet or plate metal structures.

In Figure 8 shaft 63 is indicated in dot and dash lines as beingslightly inclined, due to misali ment of its bearings, sucli'inclinationof this shaft being accommodated by slight tilting or rocking of bushing68, as will be clear. The bearing means referred to above, comprisingbushing 68 matter of my copending application for Bearing structure,Serial No. 452,066, filed July 23, 1942.

Worm l meshes with a worm wheel 11 secured on an indicator shaft 18rotatably mounted in a bracket 19 (Figure 4) secured to front wall 38 ofcurved arms 88 (Figures 1, 2, and 3) of angle overhang 23, abovediaphragm plate 29. The end portions of shaft 18 may be rotatablymounted in bushings 88 extending through the side arms of bracket 19 andheld-in position by associated lock ing plates, in the same manner asbushing68 is retained in position by locking plate I8. A bevel gear 8|is secured on shaft 18 and meshes with a bevel gear 82 (Figure 4)secured on the inner end of a stub shaft 83, passing through wall 38 andthrough a dial plate 84 secured on the outer face of the latter wall. Apointer 85, secured on the outerend of shaft 83,is movable over the dialplate 84, which is provided with a scale (Figure 2) to indicate thedifferent speeds at which shaft 31 may be driven, the higher numbers ofthis scale indicating higher speeds, and vice versa. Rotation of shaft63 in either direction causes rotation of indicator shaft 18 and of stubshaft 83, in proper direction and to proper extent, to indicate on thedial 84 the speed of drive shaft 31.

In order to remove the motor carriage 58, together with the motor 44 andassociated parts, locking plate 18 is removed. After that has been done,shaft 63 is rotated in proper direction to cause forward movementthereof, with bushing 68 and worm gear 15, through wall 38, no movementof motor carriage 58 occurring, since the adjusting shaft 63 is thenfree to move forward relative to the carriage. After shaft 63 has beenscrewed out of nut 65, it may be withdrawn from head 22. Alternatively,shaft 63 may be screwed forwardly through nut 65 sufficiently towithdraw stud 82 from bushing 6|, after which nut 65 may be moved out ofslot 66, by springing shaft 63 slightly, and screwed ofi of shaft 63,the latter being then withdrawn through wall 38. By removing lockingplate 58, the supporting and guide rods 55 are released and may be movedrearwardly slightly, sufiiciently to withdraw them from plate 28, afterwhich the motor carriage and motor, .together with the rods 55 and thebushings 53, may be lifted as a unit upward out of the top of column 2|,it being understood, of course, that the belt 4i is first removed fromabout the, pulley 42. The rods 55 and bushings 53 may then readily beremoved from the motor carriage, by moving the bushings outward throughthe slots 52. By reversing this operation the motor carriage and motor,together with the supporting and guide rods and associated parts, may bereplaced in the column 2|, as a unit, after which the locking bar isreplaced and secured to plate 3|, and shaft 63 is reinserted andthreaded through nut 65 into position with stud 62 extending throughbushing 6|. It is thus possible to remove the motor carriage andassociated parts as a unit, for cleaning, repairs, or the like, and toreturn this unit to the column 2I and reestablish operating connectionsbetween the motor carriage and the adjusting shaft 63, with expeditionand facility, which is advantageous for obvious reasons.

Shaft 38 is intended for reception of various attachments for treatingor mixing materials in a mixin bowl supported in proper relation to theattachment being used. In order that the bowl may besupported in properposition, I provide vertically adjustable bowl supporting means. Thebowl support is of approximately U shape in plan, and comprises twoforwardly and outwardly cross section, each provided, at its rearwardend, with a sleeve 89 slidable on a vertical guide rod 98 suitablysecured at its lower end to base 28- and extending upward therefrom intooverhang 23 and through a plate 9| extending across the overhang andsecured to the side walls thereof and to plate 28. The sleeves 89 areconnected by a web elebearing bushing 96 mounted through plate 9|.

Bushing 96 is provided at opposite sides thereof with straight grooves,and guide rods 98 are likewise,- provided at their inner sides andadjacent plate 9 I, with straight grooves. Locking plates 91 engage intothe grooves of bushing 96 and rods 98 and are bolted to plate 9|,effectively restraining the guide rods and the bushing, together withshaft 95, against endwise movement. A bevel gear 98 is secured on theupper end of shaft 95 and meshes with a bevel gear 99 secured on a crossshaft I88. Shaft I88 isq'otatably mounted through a bushing I8I mountedthrough one side wall of head 22 and restrained against endwise movementby a locking plate I82, in the same manner as bushing 68 of Figure 8. Ahand wheel I83, provided with a handle I84, is secured on the outer endof shaft 588 with its hub'I85 in contact with the outer end of bushingIIII. A stop collar I86 is secured on shaft I88 in contact with theinner end of bushing I8I. Shaft I88 is thus restrained against endwisemovement. The other or inner end of shaft I88 is rotatably mounted in abushing I8I mounted through an angle bracket I88 extending between plate9I and diaphragm plate 29, this bracket I88 being welded to plates 28,9|, and 29, and to the adjacent side wall of head 22.

1 necting the arms 88, this hook being pivoted at its lower end on acrank I22 of a rod I23 rockably mounted in arms 88 and confined againstendwise movement. Rod I23 extends outward beyond one of the arms 88 andhas an operating arm I24 secured on its outer end.- By turning arm I24in counterclockwise direction, as viewed in Figure 1,

V hook H9 is moved downward so as to cause the v Bushing I8! is retainedin position by a locking plate II8 bolted to bracket I88, in the Midwaybetween the plates II4 an suitable manner.

ment of the bowl. By turning arm I24 in clockwise direction, as viewedin Figure 1, the bowl may be released for removal and replacement asre-- quired. It will be seen that by rotating shaft I88 in properdirection, the bowl IIiLmay be raised or lowered as desired so as to bepositioned in proper relation to the attachment carried by the drivenshaft 38. The loose tongue and groove connection between block 93 andthe bowl support provides, in effect, a floating connection whichaccommodatesany slight inaccuracy in parts and eliminates possibility ofbinding. The above described means for adjusting the bowl supportconstitutes the subject matter of my copending application foradjustable support, Se-

rial No. 452,065, filed July 23, 1942.

Preferably, I provide means whereby auxiliary attachments, such as ameat chopper, tool grinder, fruit juice extractor, or other attachmentmay be driven from shaft 31. A take-off shaft I68 (Figure 4), suitablydriven from shaft 31, ex-

tends toward one side wall of overhang 23 of.

22I and is secured in position in any suitable manner.

The modified form of machine shown in Figures 9 to 11, inclusive,comprises a base 238, which may be a casting, a column 23I suitablysecured to base 238, this column being formed of sheet or plate'metal ofsuitable gauge, with the parts thereof welded together, and a cover 232seating upon the upper end of column 23I, the upper portion of whichprovides a head, this head including a. housing 233, which may be in theform of a casting, this housing extending forward from column 23I andoverhanging the base 238. Cover 232 is preferably provided with aperipheral flange 234 welded thereto and extending downward therefrom tofit about the head at the upper portion of the column, includingthehousing 233. A relatively thick horizontally dishead 22, coaxiallywith a cylindrical housing I82 extending from the outer face of thatwall and bolted thereto. At its outer and shaft I68 is connected, byclutch members I81 and I81 disposed in an opening 225 in diaphragm plate23, to a driven member within housing I32. This housing I82 contains thedriven member referred to and associated parts for mounting anattachment on housing I82 and establishing driving connection betweenthe attachment and shaft I68. The outer end of housing I82 normally isclosed by a removable cover plate 228, held in position in any suitableknown manner. The means for mounting the attachment and connecting it toshaft I88 to be driven thereby constitutes the subject matter of mycopending application for Power take-01f, Serial No. 452,064, filed July23, 1942, and need ,not be further described here. Sufllce it to statethat suitable means is provided for mounting an attachment andestablishing driving connection between it and take-off shaft I88. Shaft38 is intended for reception of various attachments, as previouslystated. In Figure 1 I have shown a beater 285 extending downward intobowl Hi, this beater having an upwardly extending tubular shank 286provided, at its upper end, with a shoulder 281. An attaching collar2'I8 is keyed on shaft 38 and secured thereto by a set screw 2I I.Collar 2I8 and beater285 are provided with cooperating means forsecuring the beater upon shaft 38, comprising a locking pin (not shown)carried by collar 2I8 and provided with an operating handle 2. Thereferred to means for securing the attachment or beater 288 to shaft 38constitutes the subject matter of my copending application for securingmeans, Serial No. 452,456, filed July 27, 1942, now PatentNo. 2,309,249,and need not .be further described here.

Suffice it to state that suitable means is provided for securing thebeater 288 or other attachment to shaft 38 for movement therewith.

Overhang 23 of the head 22 is provided, at its bottom, with an inwardlyextending flange 228 (Figure 1) to which is removably secured a cover.plate 22I, by means of screws 222, or in any other Plate MI is providedwith a circular opening 223 of suitable diameter to accommodate collarI54 of the lower gear housing 38 during rotation thereof. A circularsplash plate 224, of somewhat greater diameter than opening 223, isdisposed below and adjacent plate .1 a boss 258 extending from one sidewall of casting posed plate 235 extends across column 23I and is weldedthereto. A vertical plate 236 extends upward from the rearward edge ofplate 235 to the top of coumn 23I, at each side thereof, and is weldedto the side wall of the column and to plate 235. Housing 233 seats, atits rearward portion, on plate 235 and is provided at its rearward endwith lateral inwardly extending flanges 231 which seat against and arebolted to the vertical plate 236. In that manner, the housing 233 isremovably secured to the upper or head portion of the column and may bereadily removed and replaced as required. i

A vertically disposed plate 238 extends across the upper or head portionof column 23I and is welded thereto. Plate 238 is provided with twoslots opening through its upper edge, which slots receive the rearwardend portions of two supporting and guide rods 239, the forward endportions of which are inserted through plates 236. A looking bar 248 isbolted to the rearward faceof plate 238 and engages in slots cut in rods239, adjacent the rearward ends thereof, for restraining these rodsagainst endwise movement. A suitably reinforced motor carriage 24I isslidably mounted upon rods 239, by means of grooved bushings 242, in themanner previously described. An electric motor 243 is mounted on thefront wall of carriage 2 and carries, at the upper end of its shaft, aLewellen pulley 244. A v belt 245 passes about pulley 244 and about a Vpulley 246,4ecured upon a drive shaft 241 of a transmission carried bycasting 233. Adjustment of carriage 2 toward oraway from shaft 241serves to vary the speed of'the latter-shaft, in the manner previouslydescribed.

Casting 233 is provided, a short distance from the rearward end thereof,with a transverse web 248, to which web is bolted or otherwise suitablysecured a bracket 248. Two vertical stub shafts 258 and 25I aremountedin bracket 243 in parallel spaced relation, as shown more clearlyin Figure 10. A worm wheel 252 is rotatably mounted on shaft 258 and issecured to worm wheel 252 by a pin 256. An adjusting shaft 251 isrotatably mounted, at its inner end, in bracket 248 and, adjacent itsouter end, is rotatably mounted in 233. A hand wheel 259, provided withahandle "268, is secured on the outer end of shaft 251 with its hub 28I'in contact with boss 258. A stop collar 282 is secured upon shaft 251 atthe inner face of the side wall of casting 23:, this collar and hub 28Iof the hand wheel 258 cooperating with boss 258 to restrain shaft 251against endwise movement in either direction. A worm gear 263 is securedupon the inner end portion of shaft 251 and meshes with worm wheel 252for rotating the latter, and with .it the pinion 255, in eitherdirection desired. A rack bar 265 is attached, at its rearward end, tothe, front wall of motor carriage 24!, as by being pivoted between twoangle brackets 268 welded or otherwise secured to the front wall of thecarriage. bar 265 meshes with pinion 255, movement of this bar away fromthe pinion being prevented by a flanged guide roller 261 mounted uponstub shaft in contact with the face of the bar opposite to pinion-255,the flanges of this roller extending above and below bar 265. Byrotating shaft 251 in proper direction, the motor carriage may be movedtoward or away from shaft 241 for varying the speed of drive thereof.Conveniently, a

pointer 298 is secured to one side of motor carriage 2 and is movableover a suitably marked plate 269 visible through an opening in the sideof the column 23l, this opening being covered by a transparent sheet 218secured in position by plate 21! having an opening therein correspondingto the opening through the side wall of the column.

Shaft 241 serves to drive, through the transmission, a driven shaft 215extending downward from a lower gear housing 309 of the transmission andadapted to receive various attachments secured thereto by a collar 216,secured on shaft 215, and associated means in the same manner as inFigure 1, it being noted, however, that shaft 215 extends downward intothe upper portion of shank Rack 288 of the attachment 205. Attachment205 ex tends downward into a mixing bowl 211 mounted in a bowl support218 of generally U shape in plan. Support 218 comprises a hollow backmember 219, from which two arms 280 and 28! extend rearward throughvertical slots 282 extending through the front wall of column 23l and arelatively heavy plate 283, welded to the inner face of that wall.Relatively thick strips 284 are welded to the outer face of the frontwall of column 23l, at the outer sides of slots 282, and provide tracks.for guide rollers 285 carried by a shaft 286 mounted in the back member219 transversely thereof. Inner guide rollers 281, mounted on a shaft288 carried by the arms 280 and 28l, travel on the plate 283 at theouter sides of slots 282. A second shaft 289, carried by arms 288 and 28I below and parallel with shaft 288, carries two guide rollers 298 whichalso travel on plate 283 adjacent the outer sides of the slots 282. Thebowl support 218 is thus mounted for vertical movement, and isrestrained against objectionable looseness or play by the guide rollerswhich facilitate adjustment of the support.

Arm 28l extends rearward to a greater extent than arm 280, as will beclear from Figures 9 and 10, and has pivoted thereto, at 29l, the lowerend of a curved link 292. The upper end of link.

292 is pivoted at 293 to an arm 294 secured on the shaft 295, extendingtransversely of column 23! and mounted therein for turning movementadjacent the upper ends of the'slots 282. Link 292 is so formed at -itsupper portion as to extend over shaft 285, with the pivot 293 disposedslightly forward of the axis of .this shaft, when the latter is turnedinto position to raise the bowl support 218. A handle 298 is suitablysecured upon one end of shaft 285, which extends through one side wallof column 231, for convenience ,in turning this shaft. When handle 29Bis in the position shown in Figure 9, bowl support 218 is in itsuppermost position, in which position it is retained due to thedisposition of pivot 293 in advance of the axis of shaft 295. By turninghandle 296 in clockwise direction, as viewed in Figure 9, the support218 and the bowl 211 may be moved downward into the lowermost positionof support 218. v

A sleeve-like housing 334 extends from front wall 332 of casting 233 andhouses parts of means for mounting attachments to be driven from thetransmission, including a locking pin 34| restrained against endwisemovement by a collar 342 secured upon its one end and an operatinghandle 343 secured upon its other end. The outer end of housing 334normally is closed by a cover plate 348 removably secured thereon in asuitable known manner.

It will be understood, as above indicated, that various changes inconstruction and arrangement of parts of machines embodying my inventionmay be resorted to, without departing from the scope and field thereof,and I intend to include all such variations, as fall within the scope ofthe appended claims, in this application in which the preferred formsonly of my invention have been disclosed.

I claim:

1. In a machine of the character described comprising a housing and adrive shaft and a motor with driving connections between the drive shaftand the shaft of the motor variable in speed by adjustment of said motortoward and away from said shaft, supporting and guide rods' removablymounted in said housing and confined against endwise movement, acarriage for said motor supported by and slidable on said rods towardand away from said drive shaft, said rods being disposed outwardlybeyond the motor and accessible from the exterior of saidhousingproviding holds by means of which said rods and carriage andparts carried thereby may be removed from and replaced in said housingas a unit, and means for adjusting said carriage along said rods.

2. In a machine of the character described comprising an open tophousing and a vertical drive shaft and a motor having a vertical shaftwith driving connections between the drive shaft and the motor shaftvariable in speed by adjustment of said motor toward and away from saidshaft, supporting and guide rods removably mounted in said housing andconfined against endwise movement, a carriage for said motor' supportedat its upper portion on said rods depending therefrom and slidablethereon toward and away from said shaft, said rods being disposedadjacent the upper portion of the motor outwardly therebeyond andaccessible from the top of said housing providing holds by means ofwhich said rods and carriage and parts carried thereby may be removedfrom and replaced in said housing as a unit, and means for adjustingsaid carriage along said rods.

3. In a machine of the character described comprising an open tophousing and a shaft and a motor with driving connections therebetweenvariable in speed by adjustment of said motor toward and away from saidshaft, spaced supporting members secured in said housing, one of saidmembers having upwardly opening slots therein, supporting and guide rodseach having one end portion inserted through the other supporting memberand its other end portion seating in one adjacent said one member, alocking bar removably secured to said one-member engaging in saidgrooves confining said rods against endwise movement, a carriage for?said motor supported at its upper portion on said rods dependingtherefrom and slidablethereon toward and away from said shaft, said rodsbeing disposed outwardly beyond the motor and accessible from the top ofsaid housing providing holds by means of which said rods and carriageand parts carried thereby may be removed from and replaced in saidhousing as a unit, and means for adjusting said carriage along saidrods.

4. In a machine of the character described comprising an open tophousing and'a shaft and a motor with driving connections therebetweenvariable in speed by adjustment of said motor toward and away from saidshaft, spaced supporting members secured in said housing, supportingandguide rods having their end portions inserted through said members,means securing said'rods against endwise movement removable for endwisewithdrawal of said rods from said members, a carriage for said motorsupported at its upper portion on said rods depending. therefrom andslidable thereon toward and away from said shaft, said rods beingdisposed outwardly beyond the motor and accessible from the top of saidhousing providing holds by meansof which said rods and carriage andparts carried thereby may be removed from and replaced in said housingasa unit, and means for adjusting said carriage along said rods.

5. In a machine of the character described comprising an open tophousing and a shaft and a motor with driving connections therebetweenvariable in speed by adjustment of said motor toward and away from saidshaft, spaced supporting members secured in said housing, supporting andguide rods having their end portions inserted through said membersconfined thereby against lateral and downwardmovement, means securingsaid rods against endwise movement removable for endwise and upwardwith-' drawal of said rods from said members, a carriage for said motorhaving end walls each provided with slots opening through its lateraledges,

grooved bushings slidable on said rods toward and away from said shaftfitting in said slots and receiving the adjacent portions or said walls,said rods being disposed outwardly beyond the motor and accessible fromthe top of said housin providing holds'by means of which said rods andcarriage and parts carried thereby may be removed from and replaced insaid housing as a unit, and means for adjusting said carriage along saidrods.

6. In a machine of the character described comprising an open tophousing and a shaft and motor and accessible from-the top of saidhousing providing holds by means of which said rods and fill asaaaeacarriage and parts carried thereby maybe removed from and replaced insaid housing as a unit, and a removable screw shaft mounted in a wall ofsaid housing confined against endwise movement and having threadedconnection to said carriage for adjusting the latter along said '7. In amachine of the character described comprising an open top housing and ashaft and a motor with driving connections therebetween variable inspeed by adjustment of said motor toward and away from said shaft,spaced supporting members secured in said housing, supporting and guiderods having their end portions inserted through said members, meanssecuring said rods against endwise movement removable for endwise andupwardwithdrawal of said rods from said members, a-carriage for saidmotor supported by said rods slidabl thereon toward and away from saidshaft, a bearing bushing releasably secured in an opening in a wall ofsaid housing, a screw shaft mounted through said bushing, inner andouter abutment members on said shaft adjacent the ends of said bushing'restraining said shaft against endwise movement through said bushing,and a nut secured to said carriage receiving said shaft for adjustmentthereby of said carriage along said rods, said shaft and bushing andinner abutment member being movable outward through said opening whensaid bushing is released from said wall, said rods being disposedoutwardly beyond the motor and accessible from the top of said housingproviding holds by means of which said rods and carriage and partscarried thereby may be removed from and replaced in said housing as aunit.

8. In a machine of the character described comprising an open tophousing and a shaft and a motor with driving connections therebetweenvariable in speed by adjustment of said motor toward and away from saidshaft, spaced supporting members secured in said housing, supporting andguide rods having their end portions inserted through said members,means securing said rods against endwise movement removable for endwiseand upward withdrawal of said rods from said members, a carriage forsaid motor supported by said rods slidable thereontoward and away fromsaid shaft, a bearing bushing releasably secured in an opening in.,awall of said housing, a screw shaft mounted through said bushing, ahandle secured on the outer end of said shaft restraining it againstendwise move:

ment in one direction through; said bushing, abutment means secured onsaidf'shaft adjacent the inner end of said bushing restraining saidshaft against endwise movement through saidbushing in the otherdirection, and a nut secured to said carriage receiving said shaft for,

adjustment thereby or said carriage along said rods, said shaft andbushing and abutment means being movable outward through said openingwhen said bushing is released from said wall, said rods being disposedoutwardly beyond the motor and accessible from the top of said housingproviding holds by means of which said rods and carriage and partscarried thereby may be removed from and replaced in said housingasaunit.

9. In a machine of the character described, a tubular supporting columnhaving at its upper end a head providing an open top housing extendingforwardlyof said column'providing an overhang, vertical supp rting pltes secured in said housing transversely thereof adjacent the front andthe rear of and overlying said column, a transmission unit mounted insaid overhang having a drive shaft, supporting and guide rods extendingbetween said plates with their end Portions inserted therethrough, meanssecuring said rods against endwise movement removable for endwise andupward withdrawal of said rods from said plates, a carriage dependingfrom and slidable along said rods toward and away from said shaft, amotor on said carriage, driving connections between said motor and saiddrive shaft variable in speed by adjustment of said motor toward andaway from said drive shaft, and means for adjusting said carriage alongsaid rods, the latter being disposed outwardly beyond the motor andaccessible from the top of said housing providing holds by means ofwhich said rods and carriage and parts carried thereby may be removedfromand replaced in said housing as a unit. I

10. In a machine of the character described, a tubular supporting columnhaving at its upper end a head providing an open top housing extendingforwardly of said column providing an overhang, vertical supportingplates secured in said housing transversely thereof adjacent the frontand the rear of and overlying said column, a transmission'unitmounted'in said overhang having a drive shaft, supporting and guide rodsextending between said plates with their end portions insertedtherethrough, means securing said rods against endwise movementremovable for endwise and upward withdrawal of said rods from saidplates, a carriage depending from and slidable along said rods towardand away from said shaft, a motor on said carriage, driving connectionsbetween said motor and said drive shaft variable in speed by adjustmentof said motor toward and away from said drive shaft, a screw the lockingplate and the adjacent end portions of said rods having cooperatingmeans restraining said rods against upward and endwise movement whilepermitting endwise and upward movement of said rods for withdrawalthereof from said supporting plates when said locking plate is removed,a motor carriage slidable on and depending from said rods, a motormounted on said carriage with its shaft disposed vertiwardly therebeyondand outwardly beyond said pulley so as to be readily accessible from thetop shaft rotatably mounted through a wall of said housing overlyingsaid carriage and having threaded connection thereto for adjusting saidcarriage along saidrods, and means normally restraining said shaftagainst endwise movement in either direction and releasable to permitendwise withdrawal thereof through said wall, said rods being disposedoutwardly beyond the motor and accessible from the top of said housingproviding holds by means of which said rods and carriage and partscarried thereby may be removed from and replaced in said housing as aunit.

11. In a machine of the character described, an open top housing, a tronunit mounted in said housing having a vertical drive shaft, supportingplates secured in said housing transversely thereof, one of said plateshaving upwardly opening slots therein, s pp rting and guide rodsextending between said plates restingatoneendinsaidslotsandhavingtheirother end portions inserted in but freefrom the other niate for withdrawal therefrom, a locking plate removablysecured to said one supporting plate.

of the housing providing hold means by means of which said rods andcarriage and parts carried thereby may be removed from and replaced insaid housing as a unit.

12. In a machine of the character described, an open top housing, atransmission unit mounted in said housing having a vertical drive shaft,supporting plates secured in said housing transversely thereof, one ofsaid plates having upwardly opening slots therein, supporting and guiderods extending between said plates resting at one end in said slots andhaving their other end portions inserted in but free from the otherplate for withdrawal therefrom, a, looking plate removably secured tosaid one supporting plate, the locking plate and the adjacent endportions of said rods having cooperating means restraining said rodsagainst upward and endwise movement while permitting endwise and upwardmovement of said rods for withdrawal thereof from said supporting plateswhen said with an outwardly opening slot, externally grooved bushingsremovably mounted in the slots of said end walls in engagement with saidwalls and slidably supporting said carriage on said rods dependingtherefrom, a motor mounted on said carriage with its shaft disposedvertically, driving connections between said transmission shaft and saidmotor shaft variable in speed by adjustment of said motor toward andaway from said transmission shaft, said connections comprising a pulleysecured on the upper end of the motor shaft, and removable means foradjusting said carriage, said rods being disposed adjacent the upper endof said motor outwardly therebeyond and outwardly beyond said pulley soas to be readily accessible from the top of the housing providing holdmeans by means of which said rods and carriage and parts carried therebymay be removedfrom and re placed in said housing as a unit.

EDWARD J. KARP.

